Electric rotating machine

Abstract

An electric rotating machine comprising a stator core having a plurality of slots that are equally spaced on the inner surface of the stator core in the peripheral direction, a rotor that rotates inside the stator core, and an armature winding that is applied to each of the slots, wherein the armature winding is made up with a plurality of serially-connected single-turn coils that are respectively applied to the slots and the serially-connected coils of respective phases are connected in parallel.

1. An electric rotating machine comprising a stator core having a plurality of slots that are formed in an inner peripheral face of the stator and that are equally spaced in the peripheral direction, a rotor that rotates inside the stator core, and armature windings that are disposed in the slots,
 wherein each of the armature windings comprises a plurality of serially-connected single-turn coils that are respectively disposed in the slots to form serially-connected coils of respective phases, disposed in the slot, wherein the serially-connected coils of respective phases are connected in parallel to one another, 
 wherein each of the armature windings is comprised of three 2-turn coils connected in parallel to form one phase, each 2-turn coil being comprised of two single-turn coils that are serially connected and disposed in a single slot, wherein each single-turn coil comprises two layers connected in series; 
 wherein the number of slots of the stator core is an integral multiple of 18; 
 wherein each of the armature windings includes a connection side and a non-connection side; 
 wherein, for each of the armature windings, a first turn coil pitch of the armature winding disposed in the slot is equal to a second turn coil pitch, and a coil pitch at the connection side that is electrically connected at the coil is equal to a coil pitch at the non-connection side; and 
 wherein coil ends of the armature windings at the connection side are connected via connecting pieces having a connection pitch of three. 
 
   
   
     2. An electric rotating machine comprising a stator core having a plurality of slots that are formed in an inner peripheral face of the stator and that are equally spaced in the peripheral direction, a rotor that rotates inside the stator core, and armature windings that are disposed in the slots,
 wherein each of the armature windings comprises a plurality of serially-connected single-turn coils that are respectively disposed in the slots, and wherein the serially-connected coils of respective phases, disposed in the slots, are connected in parallel to one another; 
 wherein each of the armature windings is comprised of three 2-turn coils connected in parallel to form one phase, each 2-turn coil being comprised of two single-turn coils that are serially connected and disposed in a single slot, wherein each single-turn coil comprises two layers connected in series; 
 wherein the number of slots of the stator core is an integral multiple of 18, 
 wherein each of the armature windings includes a connection side and a non-connection side; 
 wherein, for each of the armature windings, a first turn coil pitch of the armature winding at the non-connection side disposed in the slot is equal to a second turn coil pitch; 
 wherein a coil pitch at the connection side is less by one than a coil pitch at the non-connection side; and 
 wherein coil ends of the armature windings at the connection side are connected via two kinds of connecting pieces, one of which has a connecting piece having a connection pitch of one and the other having a connection pitch of two. 
 
   
   
     3. The electric rotating machine according to  claim 1 , wherein
 the armature winding is divided by four in the radial direction inside the slot. 
 
   
   
     4. The electric rotating machine according to  claim 1 , wherein, for each of the armature windings, a first turn comprised of an outermost armature winding and an armature winding of an innermost-but-one layer, and a second turn comprised of an innermost armature winding and an armature winding of an outermost-but-one layer. 
   
   
     5. The electric rotating machine according to  claim 1 , wherein, for each of the armature windings, a first turn is comprised of an outermost armature winding and an armature winding of an innermost layer,
 and a second turn is comprised of an armature winding of an outermost-but-one layer and an armature winding of an innermost-but-one layer. 
 
   
   
     6. The electric rotating machine according to  claim 1 , wherein the connecting pieces are comprised of a bar-shaped conductive material. 
   
   
     7. The electric rotating machine according to  claim 2 , wherein
 the armature winding is divided by four in the radial direction inside the slot. 
 
   
   
     8. The electric rotating machine according to  claim 2 , wherein
 the armature winding is divided by two in the radial direction of the stator core and divided by 2 in the peripheral direction. 
 
   
   
     9. The electric rotating machine according to  claim 2 , wherein, for each of the armature windings, a first turn is comprised of an outermost armature winding and an armature winding of an innermost-but-one layer, and a second turn is comprised of an innermost armature winding and an armature winding of an outermost-but-one layer. 
   
   
     10. The electric rotating machine according to  claim 2 , wherein, for each of the armature windings, a first turn is comprised of an outermost armature winding and an armature winding of an innermost layer,
 and a second turn is comprised of an armature winding of an outermost-but-one layer and an armature winding of an innermost-but-one layer.